2017 Challenger ATP Cachantún Cup – Singles

Facundo Bagnis was the defending champion but chose not to defend his title.

Rogério Dutra Silva won the title after defeating Nicolás Jarry 7–5, 6–3 in the final.

Seeds
• # 🇧🇷 Rogério Dutra Silva (champion)

• # 🇦🇷 Nicolás Kicker (second round)

• # 🇦🇹 Gerald Melzer (first round)

• # 🇯🇵 Taro Daniel (quarterfinals)

• # 🇧🇪 Arthur De Greef (second round)

• # 🇪🇸 Íñigo Cervantes (first round)

• # 🇮🇹 Alessandro Giannessi (first round, retired)

• # 🇧🇷 João Souza (quarterfinals)